src/styles/components/cascader.less

@cascader-prefix-cls: ~"@{css-prefix}cascader";
@cascader-item-prefix-cls: ~"@{css-prefix}cascader-menu-item";
.@{cascader-prefix-cls} {
    position: relative;
    .@{css-prefix}input{
        display: block;
        cursor: pointer;
    }
    &-disabled .@{css-prefix}input{
        cursor: @cursor-disabled;
    }
    .@{cascader-prefix-cls}-arrow:nth-of-type(1) {
        display: none;
        cursor: pointer;
    }
    &:hover {
        .@{cascader-prefix-cls}-arrow:nth-of-type(1) {
            display: inline-block;
        }
    }
    &-show-clear:hover .@{cascader-prefix-cls}-arrow:nth-of-type(2){
        display: none;
    }
    &-arrow {
        .inner-arrow();
    }
    &-visible &-arrow:nth-of-type(2) {
        transform: rotate(180deg);
    }
    .@{select-dropdown-prefix-cls} {
        width: auto;
        padding: 0;
        white-space: nowrap;
        overflow: visible;
    }
    .select-item(@cascader-prefix-cls, @cascader-item-prefix-cls);
    &-menu{
        display: inline-block;
        min-width: 100px;
        height: 180px;
        margin: 0;
        padding: 5px 0 !important;
        vertical-align: top;
        list-style: none;
        border-right: 1px solid @border-color-split;
        overflow: auto;
        &:first-child {
        }
        &:last-child {
            border-right-color: transparent;
            margin-right: -1px;
        }
        &:only-child {
        }
        & &-item{
            position: relative;
            padding-right: 24px;
            transition: all @transition-time @ease-in-out;
            i{
                font-size: @font-size-small;
                position: absolute;
                right: 15px;
                top: 50%;
                margin-top: -6px;
            }
            &-active{
                background-color: @background-color-select-hover;
                color: @primary-color;
            }
        }
    }
}